Proponents of the rapid expansion of the Alberta oil sands highlight the huge scale of the undertaking and the huge amount of money it brings to our Canadian economy. There is a growing mystique that the tar sands are so big and central to Canada's economy that, like it or not, we just can't afford to limit their growth.

But the industry's own data tells a very different story.

Sure, the Alberta tar sands are a BIG undertaking. Then again, we are a nation that does lots of BIG things. Canada is a "can do" nation with a gigantic and varied economy. How big?

A SMALL SLICE OF THE MONEY PIE

The Canadian Energy Research Institute (CERI) says that the oil sands and oil sands-related activities accounted for 1.5% of Canadian GDP in 2000. They expect this to rise to perhaps 3.0% in 2020. For this article's charts and data I assumed 2% of GDP in 2008.

The Canadian Association of Petroleum Producers (CAPP) booklet "The Facts on Oil Sands" says that 90% of the economic benefit from oil sands stays in Alberta. CERI agrees. For Alberta that represents about 12% of their provincial GDP.

The 10% of tar sand dollars that leak out of Alberta add up to 0.2% of GDP for the rest of Canadians. As you can see, this amount is difficult to even see on a pie chart of the Canadian economy.

The fact that the tar sands contribute a small slice of our nation's GDP is, obviously, not a reason to limit their growth. But it highlights that they are not "too big" to put the brakes on should Canadians decide to address the problems the tar sands are creating.

Canada can continue to thrive even if the tar sands don't keep expanding. In fact, limiting the tar sands growth might be required for Canada's economy to thrive.

LESS THAN 1% OF JOBS

There is no doubt that the tar sands generate jobs. One of the facts in CAPP's booklet is that tar sands generate 144,000 "direct, indirect and induced jobs". Fort McMurray is a boom town. And Canadians need jobs.

The Canadian economy bustles with 17 million employed workers. Many of these have multiple jobs. So the math seems to indicate that the tar sands contribute about one half of one percent of Canadian jobs.

Again, the fact that the tar sands contribute a small share of our nation's jobs is, obviously, not a reason to limit their growth. But again it highlights that they are not so big that we can not afford to pause their growth until they manage their oversized pollution problem.

OVERSIZED CLIMATE POLLUTERS

One area everyone seems to agree on is that the tar sands' level of climate destabilizing pollution is BIG and growing.

Extraction and refining of tar sands generates 5% of Canada's climate pollution according to the federal government's official Greenhouse Gas Inventory. Industry group CAPP agrees.

Oil sand expansion proponents say this is tiny compared to other really, really BIG sources like USA coal burning...or everything else in the whole world. However they also admit that tar sands climate pollution has increased 42% in the last five years.

Their plans call for tar sands total tonnes of GHG pollution to keep increasing, and for their percentage of the ever shrinking Canadian allotment of CO2 to keep increasing and increasing. They say they are so big and important to Canada that the rest of the economy needs to make way for them to gobble up more and more of our economy's ever shrinking pie of CO2 allocation.

But not to worry they say, because we are making our tar sands much "cleaner" in recent years. They say they are releasing less CO2 per barrel produced. That will help a little, right? Maybe. If it were true. Again the industry's own numbers seem to say it isn't.

A recent report by industry group CanOils, oddly headlined "Oil Sands Producers Cut CO2 Emissions," says "per barrel emissions remain higher than 5 years ago" and total CO2 emissions are "up 42.5% from 2004." Their own chart shows CO2 emissions per barrel, for both integrated and in situ, have risen around 20% in just the last five years.

Hmmm. Does 20% percent dirtier per barrel and 40% dirtier overall in just the last five years sound like "getting cleaner" to you?

COULD TAR SANDS BECOME A JOB-KILLING ROAD TO THE POOR HOUSE?

So why would Canadians consider halting the growth in the tar sands when they produce dollars and jobs for the Canadian economy? One reason might be that the tar sands produce very few Canadian jobs and very little Canadian wealth per tonne of climate pollution.

The oil sands are economic underachievers per tonne of CO2.

Even Stephen Harper says our economy must be run on an ever decreasing number of tonnes of CO2 pollution.

How many jobs Canadians will have, and how much money will be in our pockets, is going to depend on how many jobs and how much wealth our economy can squeeze out of the our ever shrinking CO2 allotment.

The tar sands currently use up 5% of Canada's allotment of CO2 while generating just 2% of the wealth. That means the tar sands create about 3 times LESS money per tonne than the rest of the Canadian economy as a whole. Four times less money than Ontario's economy does.

Similarly, the tar sands currently use up 5% of Canada's allotment of CO2 while generating 0.5% of jobs. That means the tar sands create 10 times FEWER jobs per tonne than the Canadian economy as a whole.

Proponents of rapid expansion of the tar sands insist that the tar sands are such a huge economic engine that generate so much wealth and so many jobs that Canada just can't afford to stop their rapid expansion. The message is that the tar sands are "too big to put the brakes on".

But their own data suggests otherwise.

The reality seems to be that the tar sands are a small part of the economy and that they currently produce relatively few jobs and little money per tonne of CO2.

In a future of limited CO2, Canadians might reasonably decide to maximize our economy's wealth and job creation by limiting how much of the nation's CO2 allotment is given to such an anemic economic engine per tonne as the tar sands.

Perhaps Canadians will decide it is in all our best interests to limit the tar sands share of our shrinking CO2 allotment to their current 5%. If they can clean up their act then they can expand. If they can't they will need to produce less. It would be up to them.

In the coming future, the economic health of a nation requires maximizing jobs and dollars per tonne of CO2.